The Quantum Cascade Laser (QCL)-based terahertz-over-fibre (ToF) concept combines the strength of QCLs as ultra-wide bandwidth, high speed data sources, with the mature optical fibre technology. In this thesis, for the first time, by fusing multiple technologies, digitally selected, electronically-switchable ToF concept is experimentally demonstrated. Furthermore, the digital mode selection principle and electronic tuning mechanism provided by novel aperiodic distributed feedback (ADFB) multi-band filters are presented. For the development of electronically tunable ADFB lasers, a range of bound-to-continuum and chirped superlattice terahertz (THz) QCLs are measured across the frequency range 2.9 – 4.5 THz. The availability of these active materials allowed rapid assessments of the optimum design parameters for subsequent measurements. First, a range of photonic lattice-engineered lasers operating at 4.4 THz are characterized and key design parameters identified. Following this initial development, full electrical and spectral characterization of ADFB lasers operating at 2.9 THz are presented. The novelty of this work lies in the first-ever successful demonstration of discretely tunable QCLs, operating at six distinct THz frequencies. The ADFB technology was experimentally applied using various device geometries and gain dynamics. Toward this aim, results are presented for a Y coupled QCL architecture, showing that complex on-chip signal manipulation can be extended into the THz regime. In addition, it is demonstrated that ADFB technology provides broadband multi-channel optical filtering for the entire gain bandwidth. It is shown that discrete, purely electronic, tuning of simultaneous dual colour output can be achieved. Multi band optical filter functions derived from ADFB gratings possess highly nonlinear dispersion across the filter bandwidth and are found to modify the gain-induced, driving current-dependent continuous mode tuning. This thesis, therefore, presents a systematic experimental analysis of the dispersion engineered continuous fine-tuning in THz QCLs. In the final two chapters, the thesis presents, for the first time, transmission of tunable THz signals over standard single-mode optical fibre by up converting 2.9 THz QCL radiation via intra-cavity nonlinear mixing with an optical fibre-injected near-infrared (NIR) carrier in the 1.3 µm band. Discrete and continuous tuning technologies, as developed in chapters 3 – 5, are now successfully transferred to THz sidebands on the NIR carrier, extracted via a butt coupled single mode fibre and recorded using an optical spectrum analyzer. The major novel outcome of this thesis is the first demonstration of electronically tunable phase-matched points in a THz plasmon waveguide. The key breakthrough is the experimental confirmation of the photonic band-gap engineering of group velocity of THz signals – as both ‘fast’ and ‘slow’ switchable side bands are observed. Such novel nonlinear up-conversion of spectrally flexible THz signals may open up new possibilities for ultrafast THz telecom frameworks.

Objective of of this work is to compare the rents in Prague and Brno and assess the factors that affect it. The first chapters present the theoretical information in the area of rental housing, the cross-section of the historical development of housing policy and a view of current issues of housing policy. Then I evaluate the factors, that inflict the level of rent. Data that solve the objective of my work, I found out through a questionnaire with realized rents complemented by the offer price real estate site. Survey contained category of flats 1+1 and 1+kk, 2+1 and 2+kk, 3+1 and 3+kk. I found that the first area of the historic center by the selected category apartments with rents differs in the interval of 20-35% and in the second area near to the center is in the interval of 9-19%. The main objective of this work is discovery that Prague in terms of rents is more expensive than Brno in both defined areas.

The title of the bachelor thesis: The evaluation of selected elementary school students' physical fitness by using UNIFITTEST Prepared by: Bc. Adéla Vélová Thesis supervisor: PhDr. Ales Kaplan, Ph.D. Objectives: The aim of the diploma thesis was to find out the current level of the fitness of the 5th graders at selected primary schools in the district of Jablonec nad Nisou, which do not focus on sports. These were pupils who fall into the age category of 10 and 11 years. I processed the ascertained results. Subsequently, I made a comparison between the individual primary schools to find out which of the tested schools achieved better results. Methodology: The main method of the research was the practical testing of students by using a test battery UNIFITTEST (6-60), from which I applied four motor tests (two-footed jump, sit- ups repeatedly for 60 seconds, shuttle run 4x10 m and the Cooper's test - 12 minutes run). I compared all the measured data with the relevant UNIFITTEST standards for the given age category (10-11 years). Another part of my diploma thesis was a short anonymous questionnaire designed for physical education teachers, refering to the finding out opinions of physical education of the 5th graders. Results: The results for the boys and the girls were very balanced. Both sexes across...

The purpose of this study was to analyze teacher-selected children's literature for its potential use with critical pedagogy in the elementary classroom. This multi-analytical study uses tenets from critical multicultural analysis (CMA) and components from visual analysis (VA) to guide a critical content analysis of teacher-selected children's literature. Since it is the only nationally-recognized book list solely selected by educators, the texts for this study were selected from the Teachers' Choices Reading List titles. Although prior research on teacher-selected literature for the potential use of critical pedagogy in the elementary classroom does not exist, the results of this study show many opportunities for such within the last three years of the Teachers' Choices Reading List. A discussion on these results is presented through Paulo Freire's concept of critical pedagogy, as described in three stages: critique, hope, and action. Implications for practice and research are suggested based on the results of the study.

The software development business today is a land of constant change. The change requires the organizations who operate within this business to be flexible and quick to respond. This has led to multiple agile organization methods being developed, one of them is DevOps. A cornerstone in DevOps is self-selection - a method for assembling teams. This method gives hope of less administration, autonomy in teams and increased performance. In this essay we investigate the promises - the challenges and the possibilities - of self-selection. The case in this essay is IFS - a big software development company, implementing self-selection department by department also facing the challenges of combining traditional project values with the short iterations of an agile method. Our qualitative study investigates which the main challenges and possibilities are. We also investigate how these findings should be managed. How could the diversity, team size and autonomy be enhanced or diminished? We found that some parts of the case, and practice, were like our prior literature - but some were not. For example, the feeling of being in homogeneous teams were not always negative, and the majority of those taking part of the self-selection at IFS said they chose team by assignment - not social network as the prior literature said. Our conclusion reveals that there are several different factors to consider when having selfselection implemented in a traditional project environment. The main areas where we have found possible improvements are Team Choice, Team Diversity, Overlapping Assignments, Experienced Ownership, Management Influence and Performance.

The Permian Meade Peak Member of the Phosphoria Formation was examined at four localities in this investigation. Fossils were collected at each locality. The four collecting localities visited in this investigation are: Brazier Canyon, Utah, Montpelier Canyon, Idaho, Coal Canyon, Wyoming, and Cokeville, Wyoming. The environment of deposition of the Meade Peak Member in the study area is inferred to have been an outer shelf or basin characterized by moderately deep and quiet water. This has aided reconstruction of life habits, population dynamics, and growth characteristics of the examined species. The articulate brachiopod Leiorhynchoidea weeksi is inferred to have attached itself to the substrate by means of a pedicle. The observed variability in the sulcus of this species is assumed to have been influenced by intraspecific competition, which may reflect partitioning of nutrient resources at different levels in the water above the substrate. The articulate brachiopod Lissochonetes ostiolatus probably assumed an unattached existence, lying free on the substrate. Several population samples exhibited stunted growth relative to the L. ostiolatus population sample from Montpelier Canyon. Two environmental variants possibly contributed to the inhibition of growth. These are negative Eh, inferred from the associated organic matter in the lithologies, and competition for space. Lingula carbonaria an inarticulate brachiopod, is thought to have had an infaunal mode of life. A population sample of L. carbonaria from Cokeville exhibits substantially larger morphologic mean sizes than two other population samples. These differences can be explained by the fact the sandy lithology from which the larger collection was taken was associated with conditions which facilitated growth. Also, availability of phosphate, inferred from the P2O5 content of the lithology, probably accelerated growth because inarticulates utilize calcium phosphate as shell material. Orbiculoidea missouriensis is an inarticulate brachiopod. It is inferred to have been attached to the substrate by a pedicle. OF the three population samples of O. missouriensis analyzed, the sample from Brazier Canyon displays larger morphologic mean sizes. This is interpreted as indicating that reducing conditions, inferred from associated organic matter, were milder in that environment. The gastropod bablyonites ferrieri displaysa a low, expanded from, and is thought to have crawled over the surface of the sediment. The food source of this gastropod is not known, but may have been algae, carrion, detritus, or soft-bodied invertebrates. Two bivalves collected are assumed to have been shallow burrowing, labial palp feeders. Both Nuculopsis montpelierensis and polidevcia obesa represent this mode of life. Of the two population samples of P. obesa examined, the one from Cokeville displays larger morphologic means. The environmental stimuli proposed for this difference is competition and an inferred softer substrate in the montpelier assemblage. The bivalve Edmondia phosphatica is inferred to have been a shallow burrowing, siphonate species. Streblochondria montpelierensis and Aviculopecten phosphaticus are bivalves related to modern pectenoids. S. montpelierensis is assumed to have been a byssally attached epifaunal bivalve. The environmental factors influencing the morphologic variation are also inferred to have affected size-frequency distributions and survivorship curves. The effects of reducing conditions have resulted in higher juvenille mortality and/or inhibited growth. Coarser substrates have yielded population samples that exhibit negatively skewed distributions, whereas finer-grained substrates have yielded positively skewed distributions. Growth curves constructed for each population sample generally show a decline in growth rate with age. Some linear trends are noted. Growth lines were used to infer an approximate life span for each species. Conservative approximations of the life spans of the examined species are: L. weeksi, 9 years; L. ostiolatus, 5 years; L. carbonaria, 8 years; A. phosphaticus, 4 years; O. missouriensis, 2.3 years; P. obesa, 5 years; and B. ferrieri, 3.4 years.

The diploma thesis is focused on physical and sports activities of children in older school age. For the research were selected pupils in the 8th and 9th grades of primary schools in the Prague-East District. The main goal of the work is based on data collected by online questionnaires to analyze and compare the level of physical activities of these pupils depending on the main factors of their lives. I consider these factors to be school physical education, physical and sports activities outside of school, leisure, family, dwelling place. The theoretical part describes all requirements associated with the physical activities of children in older school age, that are necessary for a proper understanding of the research part, such as the definition of physical activities and sports, the characteristics of older school children and key factors affecting these children. A total of 240 respondents, meaning 8th and 9th grade pupils from four selected primary schools in the Prague-East District, took part in the research. For the research I used the method of a questionnaire survey, which was organized online using Google Forms. The questionnaire contains 20 questions and is divided into 5 parts, according to the main factors already mentioned. The results for each individual question are clearly viewed...

This essay explores the dynamics of literature and reading within the Swedish educational context, focusing on teachers' perspective on student self-selected literature and how self-selected literature can be included in the school curriculum. The two key questions are “What opportunities and challenges do teachers identify when working with student-selected fiction literature?” and “What role do librarians play in encouraging reading among the students?” Through survey responses from teachers, the pros and cons of working with student selected literature are discussed. Subsequently, interviews with school librarians follow to deepen the understanding of the role of school libraries. The study uses the sociocultural perspective, which means considering how learning is tied to the situation and how students are influenced by their social surrounding. Major findings highlights that the free choice serves as motivation and ignites engagement, but it is not without its challenges. Both educators and librarians emphasize the importance of cultivating habits related to library navigation and literature selection. The study underscores the essential role of librarians alongside teachers in guiding students through the world of literature. Additionally, it explores factors influencing literature teaching such as the tension between canonized literature and youth literature, access to literature, the challenge of selecting appropriately leveled text and the need to ensure students are engaging with their book of choice.

No description available.

No description available.